(Table T1) Permeabilities and bulk properties of ODP Hole 191-1179C

One of the objectives of drilling at Site 1179 was to search for microbes or biochemical evidence of microbial activity as part of the ongoing exploration of the depth and extent of the deep biosphere. The existence of living microbes has not been confirmed, but the chemistry of pore waters from the site, such as sulfate and ammonium profiles, is consistent with sulfate reduction and nitrification by anaerobic bacteria. However, chemical profiles are affected by the movement of molecules and ions through porous sediments by diffusion and advection. Permeability is thus an important consideration in the interpretation of pore water chemistry profiles. Moreover, diatomaceous sediments have some unique and, as yet, poorly understood physical properties. The purpose of this research is to measure hydraulic conductivity (permeability) in a suite of sediment samples from Ocean Drilling Program Site 1179 by the transient-pulse method. The sample set consists of four diatom ooze samples from Unit I, one radiolarian ooze sample from Unit II, and one pelagic clay sample from Unit III. The permeability of the clay is 1.92 µd, whereas the permeabilities of the overlying radiolarian and diatom oozes range from 289 to 1604 µd. Among these samples, permeability increases with porosity and grain size, in keeping with the results of previous studies.

Emerging technologies : Bio-Recovery Systems removal and recovery of metal ions from groundwater.

"August 1990."

The effects of ions in colloidal systems,

Mode of access: Internet.

The effects of ions in collodial systems,

Mode of access: Internet.

Exchange reactions of uranium ions in solution /

Work performed at the Argonne National Laboratory.

The transition temperature of alpha to beta ammonium nitrate : some methods for its determination.

Thesis (M.S.)--University of Illinois at Urbana-Champaign, 1921.

Ammonium sulfate decomposition /

"U.S. AEC Contract AT(49-1)-545."

Conversion of ammonium alum to alumina /

"U.S. AEC Contract AT(49-1)-545."

Use of ion exchange for the separation of uranium from ions interfering in its colorimetric determination /

"Date Declassified: September 23, 1955."

Ammonium diuranate precipitation with anhydrous ammonia /

Ammonium diuranate has been precipitated from nitric acid solutions by the addition of anhydrous ammonia on both laboratory and production scales. This process produced more dense and more rapidly filtered precipitates than those formed by the addition of aqueous ammonia or slurried calcium hydroxide. The filtrates from the anhydrous ammonia process were lower in uranium content than those obtained by the addition of the other reagents. Processing equipment and precipitate characteristics are discussed.